Bibcode
Wijnands, R.; in't Zand, J. J. M.; Rupen, M.; Maccarone, T.; Homan, J.; Cornelisse, R.; Fender, R.; Grindlay, J.; van der Klis, M.; Kuulkers, E.; Markwardt, C. B.; Miller-Jones, J. C. A.; Wang, Q. D.
Bibliographical reference
Astronomy and Astrophysics, Volume 449, Issue 3, April III 2006, pp.1117-1127
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4
2006
Journal
Citations
123
Refereed citations
105
Description
We present the first results of our X-ray monitoring campaign on a 1.7
square degree region centered on Sgr A* using the satellites XMM-Newton
and Chandra. The purpose of this campaign is to monitor the behavior
(below 10 keV) of X-ray sources (both persistent and transient) which
are too faint to be detected by monitoring instruments aboard other
satellites currently in orbit (e.g., Rossi X-ray Timing Explorer;
INTEGRAL). Our first monitoring observations (using the HRC-I aboard
Chandra) were obtained on June 5, 2005. Most of the sources detected
could be identified with foreground sources, such as X-ray active stars.
In addition we detected two persistent X-ray binaries (1E 1743.1-2843;
1A 1742-294), two faint X-ray transients (GRS 1741.9-2853; XMM
J174457-2850.3), as well as a possible new transient source at a
luminosity of a few times 1034 erg s-1. We report
on the X-ray results on these systems and on the non-detection of the
transients in follow-up radio data using the Very Large Array. We
discuss how our monitoring campaign can help to improve our
understanding of the different types of X-ray transients (i.e., the very
faint ones).